COMPETENCE 5

153問 • 2ヶ月前

問題一覧

1. Very small irregularities on the seat and disk of a globe valve may be manually repaired with the valve in place by the process known as

Lapping in

2. While the oily-water separator is operating in the processing mode, what is the probable cause of a low vacuum?

The coalescer beads are severely fouled

3. Gland sealing steam is used during steam turbine operation to prevent the loss of

vacuum

4. Clarifier is an oil separator use to remove

Solid particles

5. Fuel oil penetration into the cylinder of a diesel engine is

reduced by finer atomization

6. What parts of Oil Discharge monitoring and control system used to analyze the content of oil in the water that is to be discharged overboard ?

An Oil content meter

7. Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to

operate with reduced power or stop

8. The emergency bilge suction valve is typically used ?

if the bilges becomes flooded and they cannot be emptied by any other means

9. Salinity of distilled water produced from fresh water generator onboard depends on the

amount of feed set in fresh water production

10. What is the allowed quantity of oil in water that an oily water separator should be following?

According to Marpol, the oil content of the effluent mus be less than 15 ppm

11. In a diesel engine, excessive lube oil consumption can be caused by

plugged oil wiper rings

12. In the hydraulically operated turbine gland seal regulator, illustrated, the device used as the sensing unit is called alan

bellows

13. Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank?

Recirculating line to the main condenser

14. Which of the listed pumps discharges directly to the fuel oil settling tanks of a diesel engine main propulsion plant?

Transfer pump

15. Which of the following statements is correct to ensure safety to entering a pump room?

a forced ventillation system is operational

16. In the illustrated hydraulically operated turbine gland seal regulator, the exhaust dump valve is closed as a result of the piston being actuated by alan .

spring

17. What parts of Oil Discharge monitoring and control system checked the flow rate of the oily water to be discharged is measured at the discharge pipe?

A Flow meter

18. Unbalance accumulation of sludge in the bowl can result to

vibration

19. Boiler water samples should be circulated through a cooling coil prior to analysis because

this keeps the water from flashing into steam as it is drawn from the higher pressure of the boiler to the lower pressure of the fireroom

20. Discharge of oily mixtures from machinery space bilges of tankers is prohibited except which of the following equipment is fitted?

Oil Discharge Monitoring Equipment

21. A hydraulic system gear pump being fed from a reservoir frequently indicates signs of excessive pitting after two months of service. Which of the following would most likely contribute to this condition?

A vacuum condition has developed in the reservoir

22. Which of the following actions should be taken FIRST if a bilge-well of a multiple suction bilge system is unable to be pumped out?

attempt to pump out another bilge well to determine if the entire system is affected

23. The effect of too much heating in the fuel oil of main engine is

stuck plunger and barrel

24. Air leakage into the pump casing by way of the packing gland of a condensate pump is prevented by?

a water seal line to the packing.gland

25. Marpol regulation came into effect stating that the oily water separator which was previously certified for 100 ppm be changed to:

15 ppm

26. A report when an incident takes place involving the discharge or probable discharge of oil (Annex I of MARPOL 73/78) ?

harmful substances report

27. Setting the relief valve opening pressure in a hydraulic system lower than the required operating pressure will result in

Overheating of the system or lowers the operating efficiency of the system

28. An oily water separator consist of three stages, which one of the following unit segments separated the impurities and particles?

Filter stage

29. Rows of tubes installed along the walls, floor, and roof of the furnace are called

water walls

30. Which of the listed boiler components is used to equalize the distribution of water to the generating, tubes and provide an area for the accumulation of loose scale and other solid matter present in the boiler water?

Water drum and headers

31. Which of the boiler components listed receives feedwater and serves as an area for the accumulation of saturated steam?

Steam drum

32. Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded?

Check valve

33. Separator functions to separate both solid and liquid impurities of oil is known as

Purifier

34. What device is used to monitor the fuel consumption of the ship Is fuel oil system?

Flowmeter

35. Main propulsion engine lube oil sumps should be constructed

with a sloped bottom

36. The lubricating oil consumption in a running diesel engine if excessive can be caused by

excessive valve-guide clearance

37. What is the largest source of tanker pollution ?

Routine discharges during ballast and tank cleaning

38. Metallic packing rings are installed in turbine diaphragms to prevent.

interstage steam leakage along the shaft

39. When centrifugal pump is overhauled, it was found that shaft had developed grooves on it and no spare is available onboard, what action can be taken?

Machine the shaft sleeve on lathe and put back the new packing.

40. In a closed feed and condensate system, the drain from the second stage air ejector returns directly to the.

atmospheric drain tank

41. What is the reason why a centrifugal bilge pump requires priming?

Due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller.

42. A good quality oil used in main propulsion engine lubrication systems should be

resistant to permanent emulsification

43. The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that.

one valve seats upwards, while the other seats downwards

44. The purpose of the relief valve in a fuel oil service system is to .

protect the service pump from high discharge pressure

45. Which of the following types of main propulsion turbines is most likely to require a dummy piston or cylinder arrangement to counterbalance axial thrust?

Single flow reaction turbine

46. Which of the following actions should be taken to reestablish a 'blown' air ejector loop seal?

Momentarily close the valve in the loop seal line, then reopen slowly.

47. Which of the following problem is the most probable cause if an operating bilge pump is developing good vacuum, but is unable to discharge any water?

The suction strainer is clogged.

48. The ability of an oil to separate cleanly from an oil and water mixture is referred to as its?

demulsibility

49. Demulsibility of a lube oil is defined as,

the ability of oil to separate from water

50. Foot valves are primarily designed to

enable a pump and its suction line to remain primed prior to starting the pump

51. What is used to supply the energy to compress and move low pressure compressible fluids or gases through a trunking system?

Fan

52. A common type of air heater used in sectional header marine boilers is the .

gas tubular type

53. A multistage centrifugal pump can be BEST described as having

two or more impellers housed together in one casing and mounted on a single shaft

54. In a main propulsion turbine installation, the condensate pump initially discharges to the .

air ejector condenser

55. What is the reason why a positive displacement which a helical gear pumps are well suited for pumping oil?

They are essentially self-priming and capable of a high suction lift.

56. If the fuel oil temperature in the fuel oil heater attains an excessive temperature, what will happenwhat will happen?

Carbon deposits will build up on the heating surfaces

57. By which of the methods listed is the recirculating valve in the main condenser recirculating line designed to be controlled?

Thermostat

58. Air removed from the main condenser is vented to the atmosphere through the .

aftercondenser

59. The way to dispose the bilge slop on an ocean going ship having an inoperative oily water separator.is by

Holding its slops onboard until they can be discharged to a shoreside reception facility.

60. Design characteristics of a velocity-compounded impulse turbine include the utilization of .

a single pressure stage with two or more velocity stages

61. Part of the centrifugal disc purifier use to hold discs in place and directs the flow of dirty liquid to the bottom then to the discs as the oil flows upward is called

Distributor

62. In the fixed vane type emergency fire pump priming vacuum pump. After one week fire pump was not taking suction. The vacuum pump is engaging, but not developing vacuum in the suction side. What might be the cause?

Suction filter of the pump clogged.

63. Gate valves should not be used for throttling as

wire drawing of the disc will result

64. Demulsibility of a lube oil is defined as

the ability of oil to separate from water

65. When a nozzle tester is being used to test a Oclocka type fuel injection nozzle, a clogged nozzle orifice will be indicated by a

distorted spray pattern

66. When heating fuel oil used in main propulsion boilers aboard ship, the flash point may be exceeded only when.

it is required for proper atomization

67. Discharge of oily mixtures from machinery space bilges of tankers is prohibited except when, amongst other requirement, which of the following equipment is fitted?

Oil Discharge Monitoring Equipment

68. The net positive suction head of a boiler centrifugal feed pump should be calculated over and above the.

feedwater vapor pressure

69. Upon disassembling the pump, it is found that the impeller is out of balance. There is no available spare. What will you do if a centrifugal pump vibrates excessively during operation?

Remove metal from the heavy side by machining in a lathe.

70. Demulsibility of a lube oil is defined as

the ability of oil to separate from water

71. Which of the tube types listed can be considered to serve as downcomers at low firing rates, and as generating tubes at high firing rates on some boilers?

Superheater support tubes

72. What is the purpose of the booster unit in a fuel oil system?

To condition the oil for good combustion

73. Air is normally bled from a diesel engine fuel system by_

loosening the compression nuts at the injectors

74. What part of the fuel oil system is used to condition the fuel by removing solid and liquid impurities from the fuel oil?

Purifiers

75. What do you install to connect bilge and baallast line ?

non-return vaalve

76. Engineers use nomogram to get the correct

Size of gravity disc

77. The significant element contained in fuels that determines the specific heat is

hydrocarbon

78. The separation chamber of the purifier is called

Bowl

79. The bilge system has been performing well. However, the aft starboard engine room bilge-well suddenly fails to be pumped out. Which of the following should be done first to determine the cause?

Attempt to pump out another bilge well to determine if the entire system is affected

80. What is required to overcome the head difference when pumping ballast water from double bottom tanks to a higher level through the ship's side overboard valve?

Energy

81. Lubricating oil used in the cylinder liner neutralizes acids produced by the burning of high sulfur fuels to prevent

Corrosion

82. What happens when oil is heated?

The specific gravity increases

83. What part of the fuel oil systemis used to condition the fuel by removing solid and liquid impurities from the fuel oil?

Purifiers

84. A centrifugal pump will vary directly to the discharge head of what part?

Square of the impeller diameter

85. Heating the oil makes the oil,

less viscous

86. Which of the following statements is correct regarding the start-up operation of a noncondensing turbine-driven feed pump?

Open the pump suction valve prior to admitting steam to the turbine.

87. What is this term "maceration" that refers to the process in sewage treatment?

Breaking up of solid matter into fine particle.

88. Ballast pump suction filter was cleaned and the pump was lined up and it was found that there was some leakage in the filter. The pump started and the leakage started. During deballasting it was found that the pump could not take suction from one of the double bottoms tank. The cause could be

pump was drawing air from suction filter

89. Water ballast placed in a tank that has been crude oil washed, but not water rinsed, shall be regarded as

dirty ballast

90. A sample of boiler water can be chemically tested by initially adding a few drops of a specific color indicator, then slowly titrating a standard solution into the water sample until the .

sample undergoes a definite color change

91. In an operating lube oil system, the excess of water can be detected by:

the amount of water discharging from the lube oil purifier

92. When seated, the disc of a safety valve has an area of 0.75 square inches (1.9 sq cm). When the valve lifts the area is increased by 10%. If the valve lifts at 300 psig (2170 kPa), at approximately what pressure will the valve reseat?

273 psig.(1983 kPa).

93. Foot valves are primarily designed to

enable a pump and its suction line to remain primed prior to starting the pump

94. In a multistage reaction turbine, the dummy piston and cylinder function to.

reduce axial thrust

95. The recirculated oil in the fuel oil system is collected in the

Mixing tank

96. As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to.

introduce a control for maintaining constant steam pressure regardless of boiler load

97. What is the characteristic of lubricating oil which causes additional centrifuging requirements for proper purification?

Low oil demulsibility

98. What corrective action is required if a centrifugal pump gradually develops insufficieent discharge pressure ?

Replace the wear rings.

99. What parts of Oil Discharge monitoring and control system installed at the overboard so that it must close and stop the discharge when permissible limit has been reached?

An overboard valve control system

100

100. Setting the relief valve opening pressure in a hydraulic system lower than the required operating pressure will result in ?

lowers the operating efficiency of the system

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問題一覧

1. Very small irregularities on the seat and disk of a globe valve may be manually repaired with the valve in place by the process known as

Lapping in

2. While the oily-water separator is operating in the processing mode, what is the probable cause of a low vacuum?

The coalescer beads are severely fouled

3. Gland sealing steam is used during steam turbine operation to prevent the loss of

vacuum

4. Clarifier is an oil separator use to remove

Solid particles

5. Fuel oil penetration into the cylinder of a diesel engine is

reduced by finer atomization

6. What parts of Oil Discharge monitoring and control system used to analyze the content of oil in the water that is to be discharged overboard ?

An Oil content meter

7. Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to

operate with reduced power or stop

8. The emergency bilge suction valve is typically used ?

if the bilges becomes flooded and they cannot be emptied by any other means

9. Salinity of distilled water produced from fresh water generator onboard depends on the

amount of feed set in fresh water production

10. What is the allowed quantity of oil in water that an oily water separator should be following?

According to Marpol, the oil content of the effluent mus be less than 15 ppm

11. In a diesel engine, excessive lube oil consumption can be caused by

plugged oil wiper rings

12. In the hydraulically operated turbine gland seal regulator, illustrated, the device used as the sensing unit is called alan

bellows

13. Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank?

Recirculating line to the main condenser

14. Which of the listed pumps discharges directly to the fuel oil settling tanks of a diesel engine main propulsion plant?

Transfer pump

15. Which of the following statements is correct to ensure safety to entering a pump room?

a forced ventillation system is operational

16. In the illustrated hydraulically operated turbine gland seal regulator, the exhaust dump valve is closed as a result of the piston being actuated by alan .

spring

17. What parts of Oil Discharge monitoring and control system checked the flow rate of the oily water to be discharged is measured at the discharge pipe?

A Flow meter

18. Unbalance accumulation of sludge in the bowl can result to

vibration

19. Boiler water samples should be circulated through a cooling coil prior to analysis because

this keeps the water from flashing into steam as it is drawn from the higher pressure of the boiler to the lower pressure of the fireroom

20. Discharge of oily mixtures from machinery space bilges of tankers is prohibited except which of the following equipment is fitted?

Oil Discharge Monitoring Equipment

A vacuum condition has developed in the reservoir

22. Which of the following actions should be taken FIRST if a bilge-well of a multiple suction bilge system is unable to be pumped out?

attempt to pump out another bilge well to determine if the entire system is affected

23. The effect of too much heating in the fuel oil of main engine is

stuck plunger and barrel

24. Air leakage into the pump casing by way of the packing gland of a condensate pump is prevented by?

a water seal line to the packing.gland

25. Marpol regulation came into effect stating that the oily water separator which was previously certified for 100 ppm be changed to:

15 ppm

26. A report when an incident takes place involving the discharge or probable discharge of oil (Annex I of MARPOL 73/78) ?

harmful substances report

27. Setting the relief valve opening pressure in a hydraulic system lower than the required operating pressure will result in

Overheating of the system or lowers the operating efficiency of the system

28. An oily water separator consist of three stages, which one of the following unit segments separated the impurities and particles?

Filter stage

29. Rows of tubes installed along the walls, floor, and roof of the furnace are called

water walls

Water drum and headers

31. Which of the boiler components listed receives feedwater and serves as an area for the accumulation of saturated steam?

Steam drum

32. Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded?

Check valve

33. Separator functions to separate both solid and liquid impurities of oil is known as

Purifier

34. What device is used to monitor the fuel consumption of the ship Is fuel oil system?

Flowmeter

35. Main propulsion engine lube oil sumps should be constructed

with a sloped bottom

36. The lubricating oil consumption in a running diesel engine if excessive can be caused by

excessive valve-guide clearance

37. What is the largest source of tanker pollution ?

Routine discharges during ballast and tank cleaning

38. Metallic packing rings are installed in turbine diaphragms to prevent.

interstage steam leakage along the shaft

39. When centrifugal pump is overhauled, it was found that shaft had developed grooves on it and no spare is available onboard, what action can be taken?

Machine the shaft sleeve on lathe and put back the new packing.

40. In a closed feed and condensate system, the drain from the second stage air ejector returns directly to the.

atmospheric drain tank

41. What is the reason why a centrifugal bilge pump requires priming?

Due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller.

42. A good quality oil used in main propulsion engine lubrication systems should be

resistant to permanent emulsification

43. The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that.

one valve seats upwards, while the other seats downwards

44. The purpose of the relief valve in a fuel oil service system is to .

protect the service pump from high discharge pressure

45. Which of the following types of main propulsion turbines is most likely to require a dummy piston or cylinder arrangement to counterbalance axial thrust?

Single flow reaction turbine

46. Which of the following actions should be taken to reestablish a 'blown' air ejector loop seal?

Momentarily close the valve in the loop seal line, then reopen slowly.

47. Which of the following problem is the most probable cause if an operating bilge pump is developing good vacuum, but is unable to discharge any water?

The suction strainer is clogged.

48. The ability of an oil to separate cleanly from an oil and water mixture is referred to as its?

demulsibility

49. Demulsibility of a lube oil is defined as,

the ability of oil to separate from water

50. Foot valves are primarily designed to

enable a pump and its suction line to remain primed prior to starting the pump

51. What is used to supply the energy to compress and move low pressure compressible fluids or gases through a trunking system?

Fan

52. A common type of air heater used in sectional header marine boilers is the .

gas tubular type

53. A multistage centrifugal pump can be BEST described as having

two or more impellers housed together in one casing and mounted on a single shaft

54. In a main propulsion turbine installation, the condensate pump initially discharges to the .

air ejector condenser

55. What is the reason why a positive displacement which a helical gear pumps are well suited for pumping oil?

They are essentially self-priming and capable of a high suction lift.

56. If the fuel oil temperature in the fuel oil heater attains an excessive temperature, what will happenwhat will happen?

Carbon deposits will build up on the heating surfaces

57. By which of the methods listed is the recirculating valve in the main condenser recirculating line designed to be controlled?

Thermostat

58. Air removed from the main condenser is vented to the atmosphere through the .

aftercondenser

59. The way to dispose the bilge slop on an ocean going ship having an inoperative oily water separator.is by

Holding its slops onboard until they can be discharged to a shoreside reception facility.

60. Design characteristics of a velocity-compounded impulse turbine include the utilization of .

a single pressure stage with two or more velocity stages

61. Part of the centrifugal disc purifier use to hold discs in place and directs the flow of dirty liquid to the bottom then to the discs as the oil flows upward is called

Distributor

Suction filter of the pump clogged.

63. Gate valves should not be used for throttling as

wire drawing of the disc will result

64. Demulsibility of a lube oil is defined as

the ability of oil to separate from water

65. When a nozzle tester is being used to test a Oclocka type fuel injection nozzle, a clogged nozzle orifice will be indicated by a

distorted spray pattern

66. When heating fuel oil used in main propulsion boilers aboard ship, the flash point may be exceeded only when.

it is required for proper atomization

67. Discharge of oily mixtures from machinery space bilges of tankers is prohibited except when, amongst other requirement, which of the following equipment is fitted?

Oil Discharge Monitoring Equipment

68. The net positive suction head of a boiler centrifugal feed pump should be calculated over and above the.

feedwater vapor pressure

69. Upon disassembling the pump, it is found that the impeller is out of balance. There is no available spare. What will you do if a centrifugal pump vibrates excessively during operation?

Remove metal from the heavy side by machining in a lathe.

70. Demulsibility of a lube oil is defined as

the ability of oil to separate from water

71. Which of the tube types listed can be considered to serve as downcomers at low firing rates, and as generating tubes at high firing rates on some boilers?

Superheater support tubes

72. What is the purpose of the booster unit in a fuel oil system?

To condition the oil for good combustion

73. Air is normally bled from a diesel engine fuel system by_

loosening the compression nuts at the injectors

74. What part of the fuel oil system is used to condition the fuel by removing solid and liquid impurities from the fuel oil?

Purifiers

75. What do you install to connect bilge and baallast line ?

non-return vaalve

76. Engineers use nomogram to get the correct

Size of gravity disc

77. The significant element contained in fuels that determines the specific heat is

hydrocarbon

78. The separation chamber of the purifier is called

Bowl

79. The bilge system has been performing well. However, the aft starboard engine room bilge-well suddenly fails to be pumped out. Which of the following should be done first to determine the cause?

Attempt to pump out another bilge well to determine if the entire system is affected

80. What is required to overcome the head difference when pumping ballast water from double bottom tanks to a higher level through the ship's side overboard valve?

Energy

81. Lubricating oil used in the cylinder liner neutralizes acids produced by the burning of high sulfur fuels to prevent

Corrosion

82. What happens when oil is heated?

The specific gravity increases

83. What part of the fuel oil systemis used to condition the fuel by removing solid and liquid impurities from the fuel oil?

Purifiers

84. A centrifugal pump will vary directly to the discharge head of what part?

Square of the impeller diameter

85. Heating the oil makes the oil,

less viscous

86. Which of the following statements is correct regarding the start-up operation of a noncondensing turbine-driven feed pump?

Open the pump suction valve prior to admitting steam to the turbine.

87. What is this term "maceration" that refers to the process in sewage treatment?

Breaking up of solid matter into fine particle.

pump was drawing air from suction filter

89. Water ballast placed in a tank that has been crude oil washed, but not water rinsed, shall be regarded as

dirty ballast

90. A sample of boiler water can be chemically tested by initially adding a few drops of a specific color indicator, then slowly titrating a standard solution into the water sample until the .

sample undergoes a definite color change

91. In an operating lube oil system, the excess of water can be detected by:

the amount of water discharging from the lube oil purifier

273 psig.(1983 kPa).

93. Foot valves are primarily designed to

enable a pump and its suction line to remain primed prior to starting the pump

94. In a multistage reaction turbine, the dummy piston and cylinder function to.

reduce axial thrust

95. The recirculated oil in the fuel oil system is collected in the

Mixing tank

96. As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to.

introduce a control for maintaining constant steam pressure regardless of boiler load

97. What is the characteristic of lubricating oil which causes additional centrifuging requirements for proper purification?

Low oil demulsibility

98. What corrective action is required if a centrifugal pump gradually develops insufficieent discharge pressure ?

Replace the wear rings.

99. What parts of Oil Discharge monitoring and control system installed at the overboard so that it must close and stop the discharge when permissible limit has been reached?

An overboard valve control system

100

100. Setting the relief valve opening pressure in a hydraulic system lower than the required operating pressure will result in ?

lowers the operating efficiency of the system